| Holyhead to Montalegre | 806.94 mi (1,298.64 km) |
| Holyhead to Montemor-o-Novo | 1,027.02 mi (1,652.82 km) |
| Holyhead to Montemor-o-Velho | 927.69 mi (1,492.97 km) |
| Holyhead to Montijo | 1,030.61 mi (1,658.61 km) |
| Holyhead to Mortagua | 905.43 mi (1,457.15 km) |
| Holyhead to Moura | 1,057.09 mi (1,701.23 km) |
| Holyhead to Murtosa | 888.73 mi (1,430.27 km) |
| Holyhead to Nazare | 969.95 mi (1,560.98 km) |
| Holyhead to Nelas | 896.57 mi (1,442.89 km) |
| Holyhead to Obidos | 987.28 mi (1,588.87 km) |
| Holyhead to Odemira | 1,103.26 mi (1,775.53 km) |
| Holyhead to Odivelas | 1,026.03 mi (1,651.24 km) |
| Holyhead to Oeiras | 1,034.67 mi (1,665.15 km) |
| Holyhead to Olhao | 1,135.55 mi (1,827.50 km) |
| Holyhead to Oliveira de Azemeis | 879.96 mi (1,416.15 km) |
